Canon EF 28-300mm f/3.5-5.6L IS USM Telephoto Zoom Lens

It's a Very Heavy Telephoto Lens

The 3.67 pounds will make your arm start hurting after shooting for only a few hours,
particularly when using the push pull when it becomes long and you extend your arm lifting all that weight. However its a great all-around lens, especially when you're not in the mood to make several lens changes.
Perfect as a lens to travel with and
a terrific lens to walk-around with even though it weighs a lot.

Think of all the reasons you need such a big zoom range from just a single lens? Is reason you just choose to carry less equipment or don't want to take the time to swap lenses or you simply want a big lens?

The best way to travel it is by only bringing along fewer lenses, also in many circumstances, you just won't have time to switch the lens to only photograph some once upon a life time shot. Additionally if your have a tight schedule, changing lenses repeatedly will cut into the pleasures of your sightseeing. This is the key! Your main thoughts should be what you are planning to use the particular lens for and then choose a lens that fits in with highest priority.

If your need is for a lens to use in low light, this is not it. If your main objective is to shoot in low light situations like concerts and weddings , then get the 70-200mm IS f/2.8 or the 24-70mm f/2.8L IS USM lens. If you can handle the extra weight you don't have a desire to constantly be changing lens then buy the 28-300.
It's a convenient, compact zoom for easy and versatile scene selection while walking around or travelling . Optically It has the highest performance within its class, along with the convenience of being able to focus as near as 2.3 ft. throughout the overall zooming range. A powerful ring-style USM drive delivers high-speed, stealth auto focusing, and the wide zoom range offers an enjoyable, effortless picture-taking encounter.

The lens delivers the high-resolution, high-contrast, images Canon L-series are known for. An amalgamation of advanced optical engineering, including aspherical and ultra-low dispersion (UD) lenses, work in harmony to acquire such high ratio zoom of about 11x while successfully correcting for
an array of aberrations which can occur while zooming.

Other included features are a diaphragm that is circular for better background blur, robust dust and water-resistant build, ensuring professional users dependable operation even in the most grueling environments. And, in respect of those situations, this version uses only glass elements free of lead.
Like every L series lens, this one is extremely solid. It may feel somewhat bulky and large to those who have never used an L series lens before. The added bulk comes from higher glass quality more durable materials such as metal vs. plastic.

Following is a list of superzoom lenses, used for 135 format in SLRs or for APS format in DSLRs.
The minimal factor used here is 5× or more. ✓